SFvalleyGTi1
Go Kart Champion
Oh shit, I dont know if they will void my warranty since i have AWE DP.
With my experience from BMW dealerships is that each one is different. Some are assholes and will void warranty if you have coilovers or exhaust. Others did not care what mods you had they would do the repairs. There were also dealers that I dealt with that when I took my car in for turbo issues and they saw the catless downpipes, they just asked me to put the stock downpipes on and bring the car back for warranty repairs.
Your best off contacting a service advisor or one you always deal with and ask them if it would create any problems if you have downpipe on the car when they are doing this TSB. Dont be dumb driving the car into the lot fully modded and expect coming out with warranty.
I believe any dealership that does APR flashes will NOT care about any mods your car has.